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Restructuring Plans - (Additional Information) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) Employee | Jul. 01, 2018 USD ($) | Mar. 31, 2019 USD ($) Employee | Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |
Write-off of assets relating to exit activities | $ 802 | $ 1,073 |  |
Restructuring and other exit (credits) | 2,372 | 1,739 |  |
Restructuring costs incurred | 2,000 |  |  |
Restructuring reserve | 2,473 |  | $ 2,952 |
EMEA |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) | 1,294 | 1,192 |  |
EMEA | Restructurings Related to Improving Efficiency Related to Supply Chain and General Operations |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Write-off of assets relating to exit activities |  |  |  | $ 7,400
Expected reduction in number of employees | Employee |  |  | 80 |
Restructuring and other exit (credits) | 14 |  |  |
Restructuring costs incurred | 189 |  | $ 2,844 | 1,350
Restructuring reserve | 894 |  |  |
Expected additional restructuring charges | 2,000 |  |  |
EMEA | Restructurings Related to Improving Efficiency Related to Supply Chain and General Operations | Non-cash charges |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) |  |  |  | 69
EMEA | Restructurings Related to Improving Efficiency Related to Supply Chain and General Operations | Cash charges |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) |  |  | 3,104 | $ 2,260
EMEA | Restructurings Related to Improving Efficiencies of General Operations in the Americas |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Write-off of assets relating to exit activities |  |  | $ 2,500 |
Expected reduction in number of employees | Employee |  |  | 35 |
Restructuring and other exit (credits) |  |  | $ 347 |
Restructuring costs incurred | 379 |  | 83 |
Restructuring reserve | 439 |  |  |
EMEA | Restructurings Related to Improving Efficiencies of General Operations in the Americas | Non-cash charges |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) | 557 |  |  |
Americas |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) | 585 | 0 |  |
Americas | Restructurings Related to Improving Efficiencies of General Operations in the Americas |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Write-off of assets relating to exit activities |  |  | $ 4,100 |
Expected reduction in number of employees | Employee |  |  | 100 |
Restructuring and other exit (credits) |  |  | $ 1,970 |
Restructuring costs incurred | 340 |  | 1,480 |
Restructuring reserve | 147 |  |  |
Americas | Restructurings Related to Improving Efficiencies of General Operations in the Americas | Non-cash charges |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) |  |  | 2,095 |
Americas | Second Restructuring Related to Improving Efficiencies of General Operations |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Write-off of assets relating to exit activities | $ 900 |  |  |
Expected reduction in number of employees | Employee | 50 |  |  |
Restructuring and other exit (credits) | $ 585 |  |  |
Restructuring costs incurred | 113 |  |  |
Restructuring reserve | 472 |  |  |
Asia |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) | 493 | 0 |  |
Asia | Restructurings Related to Improving Efficiencies of Reserve Power Operations in EMEA |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Write-off of assets relating to exit activities |  |  | $ 5,300 |
Expected reduction in number of employees | Employee |  |  | 150 |
Restructuring and other exit (credits) | 363 |  | $ 2,772 |
Restructuring costs incurred | 979 |  | 1,683 |
Restructuring reserve | 521 |  |  |
Asia | Restructurings Related to Improving Efficiencies of Reserve Power Operations in EMEA | Non-cash charges |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) |  |  | 771 |
Asia | Restructuring Related to Improving Profitability in India |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) |  | 547 |  |
Asia | Restructuring Related to Improving Profitability in India | Non-cash charges |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) |  | $ 526 |  |
Closure Of Facility In Targovishte Bulgaria |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and other exit (credits) | $ 672 |  | 20,242 |
Expected remaining cost |  |  | $ 30,000 |

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